solder mask

A solder mask is a protective layer applied to a printed circuit board (PCB) to prevent accidental electrical shorts and solder bridging during manufacturing. It covers the non-conductive areas of the board, leaving only specific regions exposed where components need to be soldered. This thin coating, usually green but available in various colors, helps protect the circuitry from corrosion, dust, and mechanical damage, ensuring the durability and reliability of the electronic device. Essentially, the solder mask acts like a barrier that guides precise soldering and safeguards the delicate electrical pathways.